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Subtract 56/80 from 40/90

40/90 - 56/80 is -23/90.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 80 is 720

    Next, find the equivalent fraction of both fractional numbers with denominator 720
  2. For the 1st fraction, since 90 × 8 = 720,
    40/90 = 40 × 8/90 × 8 = 320/720
  3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
    56/80 = 56 × 9/80 × 9 = 504/720
  4. Subtract the two like fractions:
    320/720 - 504/720 = 320 - 504/720 = -184/720
  5. After reducing the fraction, the answer is -23/90

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